What occurrence defines the end of the protostar phase of a star's life and the start of the main-sequence phase?

Which sound would be loudest? O A. a wave with an amplitude of 1.0 OB. a wave with an amplitude of 0.1 OC. a wave with an amplitude of 0.5 OD. a wave with an amplitude of O

Which of the following is an example of speed? A truck driving 15 miles per hour south A cat running 5 meters per minute A bicyclist ridding 12 miles per hour east A plane traveling at 15 miles

A flute plays a note with a frequency of 266 Hz. What is the speed of sound if the wavelength is 1.3 m? 102 m/s 205 m/s 346 m/s 692 m/s

State any three applications of capillary action

What does the term conclude mean

How does scientific knowledge develop through making observations about the natural world?

Why do the earth have many states

Problem page a cyclist traveled 20 kilometers per hour faster than an in-line skater. in the time it took the cyclist to travel 80 kilometers, the skater had gone 30 kilometers. find the speed of the skater.

What is emitted during fission

If a magnet is broken into two pieces, what happens to the magnetic poles? One piece will have a north pole, while the other piece will have a south pole. Each piece will still have a north pole and a south pole.